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The jig is a novel equipment specifically developed for treating small coal, and its use has successfully tackled the technical bottleneck previously encountered in dry cleaning of small coal.
GEOSCIENCE BC and the Canadian Carbonization Research Association CCRA have announced the launch of a research project to test the ability of a new coal washing process to accurately evaluate coal quality and the coking characteristics of metallurgical coal during the exploration stage. Evaluating the quality of a coal deposit is essential to determining its economic viability.
This research will help us identify the best method of determining coal quality before a mine is built, stated Melanie Mackay, President of the Western Canadian Coal Society and Technical Member of the CCRA. The ability to accurately evaluate coal quality and the coking characteristics of metallurgical coal during the exploration stage is essential to determining the economic viability of a coal deposit.
The potential of finding a faster, safer more reliable method of determining coal quality is a real boon for the coal industry, added Bruce Madu, Vice President, Minerals and Mining at Geoscience BC. Ultimately, the more accurate information a prospector or company has about the quality of coal beneath the ground, the higher the value they could get for their property or the end product.
Conventionally, the float and sink method has been used to analyze small-scale exploration samples of metallurgical coal. This method used a variety of solvent-based chemicals to remove impurities such as ash white spirit, methylene bromide and perchloroethylene PCE. PCE in particular is a toxic carcinogen, commonly used in the dry cleaning industry and poses a health threat to laboratory workers.
CCRA and Geoscience BC will be using both the Roben Jig and float and sink methods to determine the accuracy and effectiveness of both methods. They will be looking at the relative impacts on four types of coal from BC three from south-east BC and one from northeast BC. Birtley Coal and Minerals Testing a division of GWIL Industries Inc. will conduct the testing. The washed samples will be sent to Ottawa for follow-up analyses at CanmetENERGY laboratories where the samples will be carbonized in a small coke oven and resultant coke properties will be evaluated.
The Roben Jig process will be declared successful if it provides equivalent or superior results to traditional coal washing methods. Success would benefit the entire coal industry as it would no longer be necessary to use harmful chemicals to clean coal for coal and coke quality analysis.
The report states that, Coal is BCs largest export commodity and provincial 2016 estimates peg the value of BCs coal production at 3.32 billion. Coal production currently represents over half of the total mineral production revenues in the province. Between 70 and 90 of coal produced in BC is metallurgical coal used to make steel.
The CCRA is a not-for-profit agency that conducts research on behalf of Canadas steel and metallurgical coal producers. Geoscience BC is an independent, non-profit organization that generates earth science information in collaboration with First Nations, local communities, governments, academia and the resource sector.
An improved air jig apparatus and method is disclosed in which a dry magnetic separator is used to separate paramagnetic and ferromagnetic minerals from the dust component of coal cleaned with the air jig. The cleaned product of the dry magnetic separator is combined with the cleaned product of the air jig thereby improving both the quality and the quantity of the unmodified air jig product.
The present invention pertains to improved method and apparatus for separation of mineral contaminants from coal which uses a dry magnetic separator to treat the dust component produced when an air jig cleans coal containing small particles.
Dry methods for separation of mineral contaminants from coal were used in the 180039s and peaked around 1965 when wet methods which are more effective in mineral separation were developed. With the growth of concern for the massive volumes of wet refuse to be managed, however, interest is again growing in the development of dry methods for ore dressing. Additionally, in arid regions of the world where water is not available for wet processing, dry methods have always been of interest.
Air jigs have specific advantages associated with the use of pulsating air rather than water. They have specific disadvantages also in that separation of coal particles larger than 45-50 mm is virtually impossible. Further, processing of unsized feeds such as 50 mm topsize results in excessive misplaced material. Additionally, the air jig like many other dry processes, has a practical upper surface moisture limit of about 6. Lastly, dust control is a necessity.
The present invention combines a modern air jig and a dry magnetic separator to achieve improved recovery and greater ash and sulfur reductions when cleaning nominal 50 mm topsize coal.
It is unusually fortuitous and was unanticipated that this combination of technologies can extend the practicality of each. The dust which must be collected in operation of the air jig can be further processed most efficiently by the dry magnetic method thus making a significant improvement in the coal recovery when using the air jig. Additionally, it is fortuitous in that the high air velocities employed by the air jig also remove surface moisture from the coal thus improving the efficiency of the dry magnetic separator. The combination is significantly more efficient than either alone.
The present invention pertains to an apparatus for separation of minerals of a material mixture. The apparatus comprises a pneumatic dry cleaner which receives the mixture and produces a first stream from dry pneumatic stratification which is carried by gas out of the cleaner. The apparatus comprises a dry magnetic separator for processing the first stream from the cleaner.
The present invention pertains to a method for separation of minerals of a material mixture. The method comprises the steps of receiving the mixture by a pneumatic dry cleaner. There is the step of producing a first stream from the mixture with the cleaner with dry pneumatic stratification which is carried by gas out of the cleaner. There is the step of processing the first stream from the cleaner with a dry magnetic separator.
Jan 28, 2020nbsp018332Jigs Laundry Services is a Laundromat, Ironing Service and Dry Cleaners all in one establishment. Using eco-friendly cleaning measures to ensure the best possible ways of having the best product available, they also have altering services to go with their already extensive offerings. They also offer a 5 off for their members. 6. Acres Dry Cleaners
FIG. 1 is a block flow diagram of an improved air flow separator.
The proposed flowsheet consists of a rotary breaker to lower the top-size of run- of-mine coal and achieve preliminary de-shaling, the FGX Dry Separator for cleaning coarse i.e. 5-mm coal, and a new air table for fine coal cleaning.
lignite coal. Dry cleaning will reduce sulfur, mercury, moisture, ash amp other minerals in lignite using air amp magnetic separation processes without the use of water. STATUS . Jul Sept, 2004 . A 5-tph air jig was purchased, installed and followed by shake-down test. Several coal types were processed with excellent mechanical operation of the jig.
coal is transported by rail haulage to a wet coal cleaning facility. FGX tests produced a reject containing 0.78 of 1.6RD float material representing 36.4 of the total feed. An economic analysis considered the savings in reduced transportation as well as the costs of the lost coal and operating the dry cleaner.
The cylinder jigs coal samples and water to separate the samples based on density. mdash Photo courtesy Melanie Mackay